Optical Waveguide Plate Comprising Phosphorus-Containing Structure Elements

Abstract

The invention relates to an optical waveguide plate having a first flat side ( 2 ), a second flat side ( 4 ), which is parallel to the first flat side, and an end face ( 6 ). The end face ( 6 ) is provided for coupling in light, and the second flat side ( 4 ) is provided for coupling out the light coupled in via the end face ( 6 ). The first flat side ( 2 ) has structure elements ( 8 ) that serve for coupling out the light and comprise phosphorus. In this way, the phosphorus can be arranged at such a spatial distance from a corresponding light source ( 10 ), serving for coupling in the light via the end face ( 6 ), that heating of the phosphorus that possibly has an adverse effect, caused by the operation of the light source ( 10 ), can be avoided. Moreover, this makes it possible to provide, at different locations of the first flat side ( 2 ), structure elements ( 8 ) which differ in their phosphorus composition, such that, in this way, light having different spectral compositions, that is to say different white hues, for example, is coupled out at the different locations of the optical waveguide plate.

1 . An optical waveguide plate having
 a first flat side ( 2 ),   a second flat side ( 4 ) that is parallel to the first flat side ( 2 ), and   an end face ( 6 ),   
       wherein the end face ( 6 ) is provided to couple in light, and the second flat side ( 4 ) is provided to couple out the light that is coupled in by way of the end face ( 6 ), and wherein the first flat side ( 2 ) has structure elements ( 8 ) that are used to couple out the light, characterised in that the structure elements ( 8 ) contain phosphor. 
     
     
         2 . An optical waveguide plate according to  claim 1 , in which the structure elements ( 8 ) consist of phosphor. 
     
     
         3 . An optical waveguide plate according to  claim 1 , in which the structure elements ( 8 ) are printed on the first flat side ( 2 ) of the optical waveguide plate, preferably by means of screen-printing methods. 
     
     
         4 . An optical waveguide plate according  claim 1 , in which the first flat side ( 2 ) has depressions in which the structure elements ( 8 ) are arranged. 
     
     
         5 . An optical waveguide plate according  claim 1 , in which the structure elements ( 8 ) are arranged in a non-uniform manner on the first flat side ( 2 ) and/or are of differing size. 
     
     
         6 . An optical waveguide plate according to  claim 1 , in which the structure elements ( 8 ) comprise a first structure element ( 81 ) and a second structure element ( 82 ), wherein the first structure element ( 81 ) has a phosphor of a first kind, and the second structure element ( 82 ) has a phosphor of a second kind that differs from the first kind. 
     
     
         7 . An optical waveguide plate according to  claim 1 , in which the structure elements ( 8 ) are connected together by way of a carrier element. 
     
     
         8 . An optical waveguide plate according to  claim 7 , in which the carrier element is a metal plate ( 12 ) that is preferably reflective. 
     
     
         9 . A lighting arrangement, having
 an optical waveguide plate according to  claim 1 .   
     
     
         10 . A lighting arrangement according to  claim 9 , further comprising
 a light source ( 10 ) for coupling in the light by way of the end face ( 6 ).   
     
     
         11 . A lighting arrangement according to  claim 10 , in which the light source ( 10 ) can radiate blue light, wherein the light source ( 10 ) preferably comprises at least one LED. 
     
     
         12 . A lighting arrangement according to  claim 9 , further comprising
 a plate-shaped reflector which is arranged adjacently to the first flat side ( 2 ) of the optical waveguide plate.   
     
     
         13 . A lighting arrangement according to  claim 12 , in which the reflector is a metal plate. 
     
     
         14 . A luminaire having
 a lighting arrangement according to  claim 9 .